Device for controlling generators.



No. 815,129. PATENTED MAR. 13, 1906. J. STRUTHERS. DEVICE FORCONTROLLING GENERATORS.

APPLIUATION FILED SBPT.12,1904.

b WWII/63155 UNITED srA rns PATENT OFFICE.

JOSHUA STRUTHERS, OF FRANKLIN, PENNSYLVANIA.

DEVICE FOR CONTROLLING GENERATORS.

Specification of Letters Patent.

Patented March 13, 1906,

To all whom it may concern.-

Be it known that I, JOSHUA STRU'ruEns, a citizen of the United States ofAmerica, residing at Franklin, in the county of Venango and State ofPennsylvania, have invented certain new and useful Improvements inDevices for Controlling Generators, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in devicesfor controlling generators; and the invention has for its object theprovision of novel means whereby the speed of the armature-shaft may beeasily controlled and limited.

Another object of this invention is to provide novel means in connectionwith the armature-shaft of generators or motors whereence is had to theaccom anying drawing,

forming a art of this app ication, in which the single figure is adiagrammatical view of my improved device when used in connection witharmature-shafts of motors for streetcars and like vehicles.

In the drawing I have illustrated what may be termed a mechanicalgovernor for controlling the current and for operating air brakes inconnection with the armature-shaft of an electric motor, the governorbeing of the type commonly known as the inverted governor, wherein thecentrifugal force of the balls is resisted by a spring around thespindle and the extension of the balls lifts the lever-spool through atoggle-joint movement. The reference character N indicates the armature,and O the shaft. P designates the commutator, and Q R thel)Il1Sli-ll()l(l(FS. A governor 8 is secured upon the shaft and isconnected. to a lever-spool 9, which engages the lever 10, pivotallymounted in the extension 11 of the armature brush-holder R. Inconnection with the armature N, I have illustrated diagrammatically acontroller S, which is operated by a lever T. The brush-holder R isconnected by a'wire 12 to mechanism contained within the controller, andsaid mechanism is connected by wires 14 to a vari able resistance 15,from which the wire 16 leads to the load, another wire 17 leading fromsaid armature brush-holder Q to the same load. The reference-Immoral 18designates a lever which is pivotally connected to the lever 10, andthis lever is adapted to control the stop which is employed inconnection with the controller, this stop being laced in a suitableposition whereby it will interrupt the movement of the lever T andrevent said lever from being further rotated in the direction in whichcurrent is turned on by the movement of said lever and a higher speedobtained. in the present illustration 1 have constructed a pivoted lever19 upon the casing of the controller, and as the speed of thearmature-shaft increases and the levers ool is raised by the centrifugalmotion of tie balls the lever 18 will be forced downwardly, which willcarry with it the outer end of the lever 19, throwing the other end uwardly to obstruct the path of travel of t e controller-lever T.

My improved device is further used for controlling air-brakes, and isparticularly used in connection with street-cars. The lever 10 carries ain 20,'Which engages in the slotted end of a )ar 21, that is connectedto the lever 22 of the air-brake system commonly carried by street-carsand other electrical vehicles. The device as illustrated in the drawingis so constructed that when the armatureshaft has reached. such a speedthat the armature is liable to be burned out the lever 19 will be throwninto such position that the controllcr cannot be moved past said lever19, which will prevent the motorman from further increasing the speed,and should the street-car be traveling at this speed and an inclinereached that is to be descended the increased rapidity of the car willcause the governor to operate the lever 10 and open the valve of theair-brake system to throw on the brakes.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1 ln apparatus of the character described, the combination of anelectric motor, a governor opcrati-vely connected to the shaft of saidmotor, a controller, a rotary shaft mounted in said controller, handlemounted on said shaft, a stop mounted on said controller and adapted toengage said handle, electrical connections between said motor and saidcontroller, and mechanism connecting said governor and said stop wherebythe movement of the governor will operate said step to limit themovement oi the controller.

2. ln apparatus of the character described the combination of anelectric motor, a governor operatively connected to the shaft of saidmotor, a controller, a rotary shalt mounted in said controller, a handlemounted on said shaft, a stop mounted on said controller and adapted toengage said handle, elec trical connections between said motor and saidcontroller, and mechanism connecting said governor and said stop wherebythe movement of the governor will operate said stop to limit themovement of the controllershat't, an air-brake valve, connectionsbetween said air-bral c valve and said governor whereby the movement ofthe governor will operate said air-brake valve 3. in an apparatus of thecharacter described, the combination with a car and an electric motormounted on the ear, ot a governor mounted on the car ano receivingmotion from said motor, a controller mounted on the car and in circuitwith said motor, means connected with said governor for stopping theshaftoi' the controller against move ment in one direction when themotor has reached a predet ermmed speed, bralimc mechanism mounted onthe car and means operated by said governor for operating said brakingmechanism after the movement of the controller-shaft has been stopped.

4. In apparatus of the character described, the combination with anelectric motor, a governor operated by said motor, a controller, arotary shaft by means of which the controller is operated to increase ordiminish the current passing through said motor, of means connected toand operated by the said governor for mechanically interrupting themovement of said shaft and thereby preventing an increase of the currentsupplied to the armature when the speed of the same has reached apredetermined limit.

In an apparatus of the character described, the combination with a car,an electric motor mounted on the car, a governor mounted on the car andoperatively connected to the armature-shaft of said motor, a con trollermounted on the car, means whereby when the armature has reached apredetermined speed the shaft of the controller will be stoppedagainstwfurther movement in a direction tending to increase the input oicurrent to the motor.

In testimony whereof I afiix my signature in the presence of twowitnesses.

JOSHUA S'IRU'IHERS. 4 it-nesses:

K. H. Bu'riinn, E. E. lo'rrER.

